Features: Broadband Multi-coated Lens to Provide Crystal Clear 3X Image Wide Field of View - 30% Bigger Than Comparable Models from Other Brands Windage/Elevation Adjustability for Optimum View Centering Innovative Flip-to-Side Mechanism for Quick Transition between 1X and 3X Image Adjustable Eyepiece for Easy Dioptric Correction Precision Machining and Anodizing for Maximum Strength and Wear Resistance Patented Quick-detach Lever Lock Mounting Base 42mm Center Height for Most Common Dot Sight Combination Completely Sealed and Nitrogen Filled for Fog/Weather Proof